Tadalista 5 mg, which contains Tadalafil as its active ingredient, can help manage pulmonary arterial hypertension (PAH) by improving blood flow in the lungs. Tadalafil works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which is found in the smooth muscles of blood vessels. In PAH, the pulmonary arteries become narrow and stiff, increasing pressure in the lungs and straining the heart. By blocking PDE5, Tadalista 5 causes relaxation and widening of these blood vessels, reducing pulmonary pressure and improving oxygen delivery throughout the body. This helps enhance exercise capacity, decrease shortness of breath, and improve overall quality of life in PAH patients.